GB/T 1574-2007 PDF English
US$155.00 · In stock · Download in 9 secondsGB/T 1574-2007: Test method for analysis of coal ash Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 1574: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 1574-2007 | English | 155 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Test method for analysis of coal ash
| Valid |
| GB/T 1574-1995 | English | 999 |
Add to Cart
|
6 days
|
Analysis of coal ash
| Obsolete |
| GB 1574-1979 | English | 719 |
Add to Cart
|
5 days
|
Analysis of the constituents of coal ash
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 1574-2007
GB/T 1574-2007: Test method for analysis of coal ash---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT1574-2007
National Standard
of the People’s Republic of China
ICS 73.040
D 21
Replacing GB/T 1574-1995, GB/T 4634-1996, GB/T 18856.13-2002
Test Method for Analysis of Coal Ash
Issued on. NOVEMBER 1, 2007
Implemented on. JUNE 1, 2008
Jointly issued by. General Administration of Quality Supervision,
Inspection and Quarantine (AQSIQ);
Standardization Administration (SAC) of the People's
Republic of China.
Table of Content
1 Scope... 4
2 Normative References... 4
3 Reagents... 4
4 Instruments and Equipment... 4
5 Preparation of Ash Sample... 5
6 Semi-microanalysis Method of Silica, Ferric Oxide, Titanium Dioxide, Aluminum Oxide,
Calcium Oxide and Magnesium Oxide... 5
7 Macro-analysis Method of Silicon Dioxide, Ferric Oxide, Aluminum Oxide, Calcium
Oxide, Magnesium Oxide and Titanium Dioxide... 20
8 Determination of Sulfur Trioxide... 32
9 Determination of Phosphorus Pentoxide (Phosphorus Molybdenum Blue
Spectrophotometric Method)... 41
10 Determination of Potassium Oxide and Sodium Oxide (Flame Photometry)... 46
11 Method for Determination of Potassium, Sodium, Ferrum, Calcium, Magnesium
and Manganese (Atomic Absorption Method)... 48
12 Test Report... 53
1 Scope
This standard specifies the reagents and materials, instruments and equipment,
analysis procedure, result calculation and method precision for the determination of
ferrum, calcium, magnesium, potassium, sodium, manganese, phosphorus, silicon,
aluminum, titanium and sulphur in coal ash.
This standard is applicable to coal, coke, coal water slurry and coal gangue.
2 Normative References
The following documents contain provisions which, through reference in this text,
constitute provisions of this standard. For dated references, subsequent amendments
(excluding correction) or revisions of these publications do not apply. However, the
parties who enter into agreement according to these specifications are encouraged to
research whether the latest editions of these labels are applicable. For any undated
references, the latest edition of the document referred to applies.
GB/T 483 General Rules for Analytical and Testing Methods of Coal
3 Reagents
Water mentioned in this standard is deionized water or distilled water with equivalent
purity.
4 Instruments and Equipment
4.1 Muffle furnace. with temperature regulating device, thermocouple, and
pyrometer; it can maintain at (815 ± 10) °C and shall have corresponding
constant-temperature area;
4.2 High-temperature muffle furnace. with temperature control device; it can
maintain at (1000±10)°C.
4.3 Analytical balance. sensitivity is 0.1mg.
4.8 Platinum crucible. 30 mL.
4.9 Silver crucible. 30 mL.
4.10 Porcelain crucible. 30 mL.
4.11 Ash pan. (120×60×14)mm.
5 Preparation of Ash Sample
Weigh a certain amount of coal sample for general analysis or coal water slurry
sample into a ash pan (For coal sample for general analysis, it is not greater than 0.15
g per square centimeter. For coal water slurry sample, weigh 15 g ~18 g; dry at
105°C~110°C in advance); place the ash pan into a muffle furnace with temperature
not greater than 100°C; under the condition of natural ventilation, and the furnace
door is open with about 15 mm of gap, heat it slowly to 500 °C in 30 min; maintain it
for 30 min;
6 Semi-microanalysis Method of Silica, Ferric Oxide, Titanium Dioxide, Aluminum Oxide, Calcium Oxide and Magnesium Oxide
6.1 Preparation of Test Solution
6.1.1 Reagents
6.1.2 Preparation for sample solution
Weigh 0.10 g (accurate to 0.0002 g) of ash sample; place into a silver crucible; wet it
with a few drops of ethanol; add 2 g of sodium hydroxide;
6.1.3 Preparation of blank solution
Same as 6.1.2, but ash sample is not added. This solution is named as solution B.
6.2 Determination of Silicon Dioxide (Silicon Molybdenum Blue
Spectrophotometric Method)
6.2.1 Method summary
With the existence of ethanol, in hydrochloric acid [c(HCl) = 0.1 mol/L] medium,
metasilicic acid reacts with molybdic acid to generate stable silicon-molybdenum
yellow. Raise the acidity to 2.0 mol/L or above, use ascorbic acid to reduce the
silicon-molybdenum yellow into silicon molybdenum blue; and determine silicon
dioxide content with spectrophotometric method.
6.2.2 Reagents
6.2.2.7 Standard stock solution of silicon dioxide. 1 mg/mL.
Accurately weigh 0.5000 g (accurate to 0.0002 g) of spectral-pure silicon dioxide
which has been burnt at 1000 °C + 10°C for 30 min; place into a platinum crucible that
contains 5 g of anhydrous sodium carbonate (GB/T 639); mix it uniformly;
6.2.2.8 Standard working solution of silicon dioxide. 0.05 mg/mL.
Accurately pipet 25 mL of standard stock solution of silicon dioxide; place it into a 400
mL beaker that contains 100mL of hydrochloric acid solution (6.2.2.3).
6.2.3 Analysis procedures
6.2.3.1 Drawing of working curve
6.2.3.1.1 Accurately pipet 0 mL, 5 mL, 10mL, 15 mL, 20 mL, 25 mL, 30 mL of
standard working solution of silicon dioxide (6.2.2.8). Respectively inject them into
100mL volumetric flasks; successively add 5 mL, 4 mL, 3 mL, 2 mL, 1 mL, 0 mL of
hydrochloric acid solution (6.2.2.4); add water to 27 mL; add 8 mL of ethanol; add 5
mL of ammonium molybdate solution; shake well; place it at 20°C ~30°C for 20 min.
6.2.3.2 Determination of sample
6.2.3.2.1 Accurately pipet 5 mL of solution A (6.1.2) and 5 mL of solution B (6.1.3)
respectively; respectively inject into 100mL volumetric flasks; add 8 mL of ethanol,
about 20 mL of water, 5 mL of ammonium molybdate solution; shake well; place it at
20°C ~30°C for 20 min.
6.2.3.2.2 It's operated according to 6.2.3.1.2.
6.2.5 Method precision
Precision of determination result for silicon dioxide is shown in Table 1.
6.3 Continuous Determination of Ferric Oxide and Titanium Dioxide
(Spectrophotometric Method with Ferrotitanium Reagent)
6.3.1 Method summary
Under the condition of pH= 4.7~4.9, ferric ion reacts with ferrotitanium reagent to
generate purple complex; use spectrophotometric method to determine ferric oxide.
Add adequate amount of ascorbic acid, so that purple of the solution disappears;
titanic ion reacts with ferrotitanium reagent to generate yellow complex, use
spectrophotometric method to determine titanium dioxide.
6.3.2 Reagents and materials
6.3.2.1 Ascorbic acid.
6.3.2.2 Ferrotitanium reagent solution. 20 g/L. Weigh 2 g of ferrotitanium reagent
(C6H4O8S2Na2); dissolve it into water; dilute to 100 mL with water.
6.3.2.8 Standard working solution of ferric oxide. 0.1 mg/mL.
Accurately pipet 10mL of standard stock solution of ferric oxide; place into a 100mL
volumetric flask; dilute to the mark with the hydrochloric acid solution (6.3.2.4); shake
well.
6.3.2.11 Congo red test paper.
6.3.3 Analysis procedures
6.3.3.1 Drawing of working curve
6.3.3.2 Determination
6.3.3.2.1 Accurately pipet 5 mL of solution A and 5mL of solution B; respectively
pour them into 50 mL volumetric flasks; add 10 mL of ferrotitanium reagent solution;
shake well. Drop-add ammonia water until the solution accurately appears in red (if
ferrum content is very low, small piece of Congo red test paper may be added;
drop-add ammonia water until the test paper becomes red); add 5 mL of buffer
solution; dilute to the mark with water; shake well. After being placed for 1h, use a
1cm cuvette to determine its absorbance at wave length of 570 nm.
6.3.5 Method precision
7 Macro-analysis Method of Silicon Dioxide, Ferric Oxide, Aluminum Oxide, Calcium Oxide, Magnesium Oxide and Titanium Dioxide
7.1 Determination of Silicon Dioxide (Animal Glue Condensing Mass Method)
7.1.1 Method summary
Add sodium hydroxide into ash sample for melting; place it into boiling water for
leaching; acidify it with hydrochloric acid; evaporate it to dryness; in the medium of
hydrochloric acid, use animal glue to condense silicic acid; precipitate and filter it;
burn and weigh it.
7.1.2 Reagents and materials
7.1.3 Test procedure
7.1.5 Method precision
Precision of determination result of silicon dioxide is shown in Table 8.
7.2 Continuous Determination of Ferric Oxide and Aluminum Oxide
(Complexometric Titration with EDTA)
7.2.1 Method summary
Under the condition of PH=1.8~ 2.0, use sulfosalicylic acid as the indicator; use EDTA
standard solution to titrate. Add excessive EDTA for complex with aluminum ion and
titanium ion, etc. Under the condition of pH = 5.9, use xylenol orange as the indicator;
use zinc salt to titrate the remaining EDTA; then add villiaumite to replace the EDTA
that has been complex with aluminum ion and titanium ion; use zinc acetate standard
solution to titrate.
7.2.2 Reagents
7.2.3 Analysis procedures
7.2.3.1 Accurately pipet 20 mL of solution C; place into a 250mL beaker; dilute with
water to about 50mL; the remaining procedures are operated in accordance with
calibration method in 7.2.2.9.
7.2.4 Result calculation
7.2.4.1 The mass fraction w(Fe2O3)(%) of ferric oxide is calculated according to
Formula (14).
7.2.4.2 The mass fraction w(Al2O3)(%) of aluminum oxide is calculated according to
Formula (15).
7.2.5 Method precision
7.3 Determination of Calcium Oxide (EDTA Complexometric Titration)
7.3.1 Method summary
Use triethanolamine to mask ferrum icon, aluminum icon, titanium icon and
manganese icon. Under the condition of pH ≥12.5, use calcein-thymolphthalein as
indicator; use EDTA standard solution to titrate.
7.3.2 Reagents
7.5.5 Method precision
The precision of determination result of titanium dioxide is shown in Table 13.
8 Determination of Sulfur Trioxide
This standard involves three methods for determination of sulfur trioxide, namely,
barium sulfate mass method, combustion neutralization method, and coulomb
titration.
8.1 Barium Sulfate Mass Method
8.1.1 Method summary
Leach the sulfur in ash sample with hydrochloric acid; filter the solution; neutralize the
filtered solution with ammonium hydroxide; and precipitate ferrum. Add barium
chloride into the solution to generate barium sulfate sediment; and weigh it.
8.1.2 Reagent
8.1.2.1 Hydrochloric acid (GB/T 622) solution. volume ratio is (1+3).
8.1.2.2 Ammonia (GB/T 631) solution. volume ratio is (1+1).
8.1.2.3 Hydrochloric acid (GB/T 622) solution. volume ratio is (1+1).
8.1.2.4 Barium chloride solution. 100 g/L. Weigh 10g of barium chloride (GB/T 652);
dissolve it in water; dilute to 100 mL with water.
8.1.2.5 Silver nitrate solution. 10g/L. Weigh 1g of silver nitrate (GB/T 670); dissolve
it in water; dilute to 100 mL with water; add several drops of nitric acid (GB/T 626);
store in a brown bottle.
8.1.2.6 Methyl orange indicator. 2g/L. Weigh 0.2 g of methyl orange; dissolve in
water; dilute to 100 mL with water.
8.1.2.7 Filter paper. medium-speed qualitative filter paper.
8.1.2.8 Filter paper. slow-speed qualitative filter paper.
8.1.3 Analysis procedure
8.1.4 Result calculation
The mass fraction w(SO3)(%) of sulfur trioxide is calculated according to Formula
(21).
8.1.5 Method precision
The precision of determination result of sulfur trioxide is shown in Table 14.
8.2 Combustion Neutralization Method
8.2.1 Method summary
Use activated carbon powder as additive; ash sample is decomposed in 1300°C
airflow; use hydrogen oxide solution to absorb; use methyl red - bromocresol green as
indicator; use sodium hydroxide standard solution to titrate.
8.2.2 Reagents and materials
8.2.3 Instruments and equipment
8.2.3.5 T-shaped glass tube. used for installation of push rod and air inlet.
8.2.3.6 Gas flowmeter. the maximum measuring range is 1 L/min.
8.2.3.7 Gas filter. glass melting plate made from the sintering of glass sand; model
of melting plate. G2; pore size. 4.9 μm~9 μm; used for gas dispersion.
8.2.3.8 Conical flask. 250mL.
8.2.3.9 Gas bottle. 250 mL, 2 pieces; one with potassium hydroxide solution (8.2.2.4)
and the other with concentrated sulfuric acid (8.2.2.2).
8.2.3.10 Drying tower. 250 mL, with allochroic silicagel inside.
8.2.3.11 A water suction pump or vacuum pump.
9.1 Method 1
9.1.1 Method summary
Use hydrofluoric acid - perchloric acid to decompose ash sample to remove silicon
dioxide; pipet some solution; add it in ammonium molybdate and ascorbic acid
solution to generate phosphorous molybdenum blue; use spectrophotometric method
to determine.
9.1.2 Reagent
9.1.2.9 Reagent solution. add 10 mL of ascorbic acid solution (9.1.2.5) and 5 mL of
antimony potassium tartrate solution (9.1.2.8) into 35 mL of ammonium aluminate -
sulfuric acid solution (9.1.2.7); mix up uniformly. The solution shall be prepared
immediately before use.
9.1.3 Analysis procedure
9.1.3.1 Preparation of to-be-tested sample solution
Weigh 0.1000g of ash sample (accurate to 0.0002g); put it into a 30 mL PTFE crucible;
wet it with water; add 2 mL of perchloric acid and 10 mL of hydrofluoric acid;
9.1.3.2 Preparation of blank solution
It is as specified in 9.1.3.1, but ash sample is not included.
9.1.3.3 Drawing of working curve
9.1.3.3.1 Accurately pipet 0mL, 1mL, 2mL, and 3mL of standard working solution of
phosphorus pentoxide; respectively pour them into 50mL volumetric flasks; add 5 mL
of reagent solution (9.1.2.9); maintain for 1 min ~2 min; then dilute to the mark with
water; shake well. After being placed at 20°C~30°C for 1h, use a 1cm~3 cm cuvette to
determine its absorbance at wave length of 650 nm on spectrophotometer.
9.2.2 Reagent
9.2.2.1 Hydrofluoric acid (GB/T 620).
9.2.2.2 Sulfuric acid (GB/T 625). relative density is 1.84.
9.2.2.3 Sulfuric acid (GB/T 625) solution. c(1/2H2SO4)=0.2 mol/L.
9.2.3 Analysis procedure
9.2.4 Result calculation
The mass fraction w(P2O5)(%) of phosphorus pentoxide is calculated according to
Formula (26).
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
Tips & Frequently Asked QuestionsQuestion 1: How long will the true-PDF of English version of GB/T 1574-2007 be delivered?Answer: The full copy PDF of English version of GB/T 1574-2007 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice. Question 2: Can I share the purchased PDF of GB/T 1574-2007_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 1574-2007_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 1574-2007 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds. Question 5: Should I purchase the latest version GB/T 1574-2007?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 1574-2007 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. How to buy and download a true PDF of English version of GB/T 1574-2007?A step-by-step guide to download PDF of GB/T 1574-2007_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).
Step 2: Search keyword "GB/T 1574-2007".
Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart.
Step 4: Select payment option (Via payment agents Stripe or PayPal).
Step 5: Customize Tax Invoice -- Fill up your email etc.
Step 6: Click "Checkout".
Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively.
Step 8: Optional -- Go to download PDF.
Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice.
See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9
|